Datasheet

Datasheet
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Ultra-Wide Capture Bandwidth
Today’s wireless communications vary significantly with time,
using sophisticated digital modulation schemes and, often,
transmission techniques that involve bursting the output.
These modulation schemes can have very wide bandwidth as
well. Traditional swept or stepped spectrum analyzers are ill
equipped to view these types of signals as they are only able
to look at a small portion of the spectrum at any one time.
The amount of spectrum acquired in one acquisition is called
the capture bandwidth. Traditional spectrum analyzers sweep
or step the capture bandwidth through the desired span to
build the requested image. As a result, while the spectrum
analyzer is acquiring one portion of the spectrum, the event
you care about may be happening in another portion of the
spectrum. Most spectrum analyzers on the market today
have 10 MHz capture bandwidths, sometimes with expen-
sive options to extend that to 20, 40, or even 160 MHz in
some cases.
In order to address the bandwidth requirements of modern
RF, the MDO4000C Series provides ≥1 GHz of capture
bandwidth. At span settings of 1 GHz and below, there is no
requirement to sweep the display. The spectrum is gener-
ated from a single acquisition, thus guaranteeing you’ll see
the events you’re looking for in the frequency domain. And
because the integrated spectrum analyzer has a dedicated RF
input, the bandwidth is flat all the way out to 3 GHz or 6 GHz,
unlike a scope FFT that rolls off to 3 dB down at the rated
bandwidth of the input channel.
Spectral display of a bursted communication both into a device through Zigbee
at 900 MHz and out of the device through Bluetooth at 2.4 GHz, captured with a
single acquisition.
Spectrum Traces
The MDO4000C Series spectrum analyzer offers four different
traces or views including Normal, Average, Max Hold, and Min
Hold. You can set the detection method used for each trace
type independently or you can leave the oscilloscope in the
default Auto mode that sets the detection type optimally for
the current configuration. Detection types include +Peak, –
Peak, Average, and Sample.
Normal, Average, Max Hold, and Min Hold spectrum traces
Triggered versus Free Run Operation
When both the time and frequency domains are displayed,
the spectrum shown is always triggered by the system
trigger event and is time-synchronized with the active time-
domain traces. However, when only the frequency domain is
displayed, the spectrum analyzer can be set to Free Run. This
is useful when the frequency domain data is continuous and
unrelated to events occurring in the time domain.
Advanced Triggering with Analog, Digital and
Spectrum Analyzer Channels
In order to deal with the time-varying nature of modern RF
applications, the MDO4000C Series provides a triggered
acquisition system that is fully integrated with the analog,
digital and spectrum analyzer channels. This means that a
single trigger event coordinates acquisition across all chan-
nels, allowing you to capture a spectrum at the precise point
in time where an interesting time domain event is occurring.
A comprehensive set of time domain triggers are available,
including Edge, Sequence, Pulse Width, Timeout, Runt, Logic,
Setup/Hold Violation, Rise/Fall Time, Video, and a variety of
parallel and serial bus packet triggers. In addition, you can
trigger on the power level of the spectrum analyzer input.
For example, you can trigger on your RF transmitter turning
on or off.